The end lead of the coil 1 is connected to the begining of a coil placed at a distance equal to one pole pitch is called................
A. simple lap winding, B. simple wave winding,
C. duplex lap winding, D. duplex wave winding.

Laying the coils clockwise .the connections to the commutator segment's will also proceed clock wise then this type of winding is called as......
A retrogressive lap or wave winding.
B progressive lap or wave winding.
C lap winding.
D wave winding.

The magnetic field produced in the stator of a three phase induction motor travels at.......
A rotating speed. B asynchronous speed. C synchronous speed. D slip speed.

The syncthronous speed of an induction motor refers to the speed of the.............
A rotor B armature C rotating magnetic field D value marked on the name plate

It is advisable to avoid direct on line starting of induction motor having a capacity of more than 3HP because............
A the starting torque is very low
B the motor takes five to seven times of its full load current
C it will pick up very high speed
D it will tun in the reverse direction

On switching'ON'the starter the magnetic contactor vibrates heavily the causes may be............
A high voltage.
B dirt in the armature contact surface.
C low voltage and single phasing.
D low voltage and dirt on the armature contact surface.

When a rotating machine is observed under a gas discharge lamp, it appear to be either stationary or seams to be running in reverse direction. What is reason for it ...........?a) Argonb) Heliumc) Neon
d) None of these

The circuit of tube starter has condenser which
a) Reduce the spark
b) Improves power factor
c)Limit the current
d) Reduce the stroboscope effect

The diameter of electrode in a D.C arc lamp is ............
a) Positive electrode very thick
b) Negative electrode very thick
c) Positive electrode very thin
d) Both similar

The threaded portion on the outer side of the edison screw type lamp holder should be connected with
a) Neutral wire ofthe circuit
b) Half wire of the circuit
c) Phase wire of the circuit
d) Earth wire of the circuit

Which rnethod is used to make a full wave rectifier?
a)Bridge method
b) Center tap method
c) Both (a) & (b)
d) None ofthese

Rectification is of how many types ..........
a) Oneb) Two c) Threed) Four

The supply in Growler is ..........
a)DCb) AC
c) Both (a) & (b)d) None of these

The number of coils per group in balanced winding is.........
a)Sameb) Un equal
c) Both (a) & (b)d) None or these

The mostly used winding for rewinding is ..........
a)Basket winding
b) Chain winding
c) Concentric winding
d) None of these

For earth with testing volt meter when connected to commutator segment and body of an amature, the growler is connected to A.C. supply. The milli voltmeter should read
a)No reading
b) Low reading
c) Infinity
d) More reading

The number of slots with respect of number of coils in double layer winding is .........
a)Same
b) Less
c) More than one
d) Half

Pitch factor in full pitch winding is ............
a)One
b) Less than one
c) More than one
d) None of these

The numbers of windings in double cage induction motorsa) One b) Two c) Three d) Four